Citrus is a common fruit in life and most people like it. The use of acaricides is essential in the growth of citrus. This article will give you a detailed introduction to the selection of citrus acaricides. 1. Select a suitable acaricide according to the control object. Among the citrus mites, although the red spider and the rust spider belong to the same species, the growth and decline patterns, the damage characteristics and the control methods are different. Therefore, in the prevention and control of mites, the use of the same acaricide often results in different control effects. For example, Nissula has good control effect on citrus red spider, but it is basically ineffective against citrus rust spider; bromo oxime ester has high control effect on citrus rust spider, but citrus red spider has unsatisfactory efficacy. Therefore, it is necessary to select suitable acaricides according to the target of citrus damage control, the occurrence and decline of the citrus. Before the application of the drug, an orchard survey should be conducted to confirm which of the most harmful diseases occurred during the period. For example, in the period of citrus red spider, nicotinol, tork, amitraz, arsenic, acetophenone and other acaricides may be used. For example, citrus rust spiders, polysulfide suspensions, and stone sulphur mixtures are used. If both spider mites and rust spiders occur at the same time, then the acaricides which are ideal for both pest control, such as triazolyl tin suspending agent, ketone, etc., can also be used. For example, a suspension of nisolron plus polysulfide, or a mixture of nisolron plus bromo oxime or a double formazan plus polysulfide. Chemical control must be carried out according to the light, heavy, slow and urgent use of the two kinds of pests. That is, depending on which kind of pests occur at the time, the growth rate is fast, the damage is high, and it is urgent to control it, the corresponding killing should be chosen. The agent is mainly used, and the other type of acaricide is supplemented, or two kinds of acaricides that can cure both diseases. 2. Use acaricides according to different growth stages of citrus. Different agicides must be used for the occurrence of citrus in different growth stages, mainly due to the different sensitivity of citrus plants to acaricides at different growth stages, that is, the safety of acaricides used in different growth stages of citrus. . In the practice of many years, fruit farmers have found that some acaricides will have obvious symptoms of phytotoxicity when used in the shoots and tender fruits of citrus. For example, triazolyl tin (powder or suspension) can be used in the spring shoots (low temperature) at normal concentrations, which will cause severe flowering, defoliation, and fruit drop. In the young fruit stage (temperature below 20 °C), leaf and fruit malformation will still occur. . In recent years, the phenomenon of serious phytotoxicity caused by misuse of triazolyl suspending agents has occurred from time to time. In addition, the use of Ketite in the shoots and tender fruits of citrus will cause water-stained spots, and high-concentration polysulfide suspensions may cause sunburn in high temperature periods. Therefore, in the sensitive period of citrus growth, such as the new shoot period, flowering period or at the same time in the low temperature and high temperature stage, the safe acaricide and safe use concentration must be carefully selected in order to receive good control effect. 3. Use different acaricides according to meteorological conditions. Different acaricides have different physical and chemical properties, which determine that they have different pharmacological effects under different meteorological conditions. Citrus is in a sensitive growth period and may cause different degrees of phytotoxicity. Therefore, when using acaricides, it is necessary to consider the meteorological factors. Nissolon acaricide is used in summer, its efficacy is not ideal, and its duration of action is short; while in the autumn, the drug is highly effective and has a long-lasting effect. The reason is that there are many rainy days and heavy rainfall in the south, and the Nissolang emulsifiable concentrate is slow in effect, and the adhesion is not strong, and it is not resistant to rain erosion. Therefore, the drug effect is obviously reduced in summer, and the general effect period is below 20 hours. The drug is used in autumn and winter. Due to the low rain, the efficacy of Nissolang can be fully exerted, and the effective period can be 30-40 hours. After many years of experimental observation, in the summer, Kruth, triazolium tin suspending agent and other acaricides with quick-acting and strong adhesion are used. The control of mites can improve the efficacy and reduce the damage caused by mites. Most acaricides are used at different temperatures and their effects are significantly different. Under low temperature conditions (generally below 20 ° C), many acaricides are not ideal, such as Tork, 螨代治, Kruth, amitraz, etc., but some acaricides are used under low temperature conditions. There is no obvious effect on its efficacy, such as Nissolang, Bazhiling, tacrolimus, triazolyl, etc.; and the use of individual acaricides in the low temperature period is more suitable than in the high temperature period. If the use of chlorpyrifos to control cockroaches, the use period in the high temperature period is short, while the winter use shows its quick effect and long duration. In recent years, citrus orchards have been used to control cockroaches in the low temperature period. Generally, triazolium tin suspending agents, scorpion scorpion and scorpion ketone are used. Ball Valve,Pvc Ball Valve,Ball Check Valve,Threaded Ball Valve Haogong Valve Co Ltd , https://www.haogongvalve.com